Operational Case Examples; Case 1: Idr 8.448 Mbps, 3/4 Rate Viterbi - Comtech EF Data DMD50 Installation And Operation Manual

DMD50 Universal Satellite Modem
IBS:
2.048 Mbps or below
Closed Network:
8.448:
6.312:
2.048:
1.544:
Any Rate 2.048 & lower:
E.3

Operational Case Examples

For best results always begin setup by setting the data rate to 512 Kbps. This
data rate is applicable for all modes and as such provides a convenient
launch point for setting up the modem. Any mode of operation can be
entered from this starting point.
E.3.1 Case 1: IDR 8.448 Mbps, 3/4 Rate Viterbi
Starting with the Data Rate = 512 Kbps
Modulator:
Method 1 -
Under Interface Menu:
Set mode to IDR
Under Mod IF Menu:
MN-DMD50– Revision 3
1/2, 3/4, 7/8 Rate
96 Kb Framing or No Framing, 3/4, 7/8 Rate FEC
96 Kb Framing or No Framing, 1/2, 3/4, 7/8 Rate FEC
7/8 Rate FEC
96 Kb Framing or 1/15 Framing or No Framing, 1/2, 3/4, 7/8
Rate FEC
1/15 Framing or No Framing, 1/2, 3/4, 7/8 Rate FEC
Set Interface type
Set Tx clock selection
Under Mod Data Menu:
Set code rate to 3/4 VIT
Set desired Tx frequency and power level
96 Kb Framing or 1/15 Framing or No Framing, 1/2, 3/4,
Set data rate for 8448000
Turn IF ON
Strap Codes
E–6